Fantastic property. Our favorite place (Airbnb or otherwise) we stayed in nearly one month in Bangkok, and we stayed in many regions of the city.
Wimonpak and her family have done a wonderful job refurbishing the rooms and they're well furnished, comfortable, clean and very pleasant. Loved the floor to ceiling windows. It's also quiet by BKK standards. Wifi also works quite well.
We actually loved the location--close to the BTS, plenty of shops, restaurants, nice massage businesses, cafe, and great little food stands. Also, it's not overwhelmingly flush with traffic or tourists like other areas of BKK. Yet, it's very closely located to the wonderful and convenient BTS.
Notably, Wimonpak is super responsive to messages and speaks English very well.
It's a gem of BKK accommodations in our mind. Grab if available!